About Cleonis pigra (J.A.Scopoli, 1763)
Cleonis pigra, commonly known as the sluggish weevil or large thistle weevil, is a species of weevil. It is native to Eurasia and has been recorded in Britain. It was introduced into North America for the biological control of creeping thistle. This species develops inside the roots of plants that belong to the family Asteraceae. Multiple alternative spellings of this species name appear in scientific literature: Cleonis piger, Cleonus piger, and Cleonus pigra. However, the correct spelling according to ICZN Article 31.2 is Cleonis pigra. This species can be identified by a double V-pattern on its elytra and a rostrum that has three sulci.
